Pipe-wrench.



No. 885,120. PATENTED APR. 21, 1903.

- G. c. WlNsLow.

PIPE WRENCH. 1 APPLIOATION FILED JUNE 12, 1.905.

Z SHEETS-SHEET 1.

lllllllllll 1i, mi]

Witnesses mitigar, onnron. f

GEORG C. WINSLOW, OF KALAMAZOO, MICHIGAN.

PIPE-WRENCH.

Specification of Letters Patent.

Patented April 21, 190s.

Application filed June 12, 1905. Serial'No. 264,823.

To all whom it may concern:

Be it known that I, GEORGE C. WINsLoW, a citizen of the United States,residing at the city and county of Kalamazoo, State of Michigan, haveinvented certain new and useful Improvements in Pipe-Wrenches, of whichto provide an improved pipe wrenchv which isv adjustable without the aidof nut screws or the V like. Third, to provide an improved pipe wrenchwhich is simple and economical in structure and very strong and durable.

Further objects, and objects relating to the structural details willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims. i

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings forming a part of thisspecification, in which- Figure 1 is a detail view of my improved pipewrench, partially in section, on a line corresponding to line 1 1 ofFig` 2. Fi 2 is a transverse sectional view taken, on a'Iinecorresponding to line 2 2 of Fig. 1. Fil. v3 is a transverse sectionalview taken onla ine corresponding to line 3-3 of Fig. 1. Fig. 4 is anedge view of the movable jaw and its shank. Fig. 5 is a detailtransverse sectional view through the jaw B, taken on a linecorresponding to line 5-5 of Fig. 1. Fig. Gisa detail longitudinalsectional view taken on a line correspondin to line 6-6 of Fig. 1,showing structura detailsk of the fixed jaw A. Fig. 7 is a sideelevation view of a modiiied construction of my improved pipe wrench,partially in section, on a line corresponding to line 7-7 of Fig. 9.Fig. 8 is a detail side elevation view of my improved pipe wrench,partially in section, showing the parts in position to be adjusted. Fig.9 is a detail rear edge view of the structure shown in Fi 7. Fig. 10 isa plan view ofthe bearing b ook D of they modified construction. j Fig.11 is a detail sectional view taken ona line corresponding to line 11-11of Fig. 8.

In the drawings similar letters of reference refer to similar partsthroughout the several views, and the sectional lines are taken lookingin the direction of the little arrows at the ends of the section lines.

Referring. to the lettered arts of the `drawings, I provide a lever-li ehandle A having a relatively iiXed jaw A on the inner end thereof. Thejaw A is preferably formed with side plates adapted to embrace the endof the lever and is retained thereon by the pin a. An adjustable jaw Bis provided carried by the shank B. The jaw B and its shank B arepreferably formed of a piece of boiler plate folded upon itself, asclearly appears in Fig. 4. The engaging face B is inserted in the foldof the plate and retained therein by a rivet or pin b. I thus secure ajaw and shank which possesses great strength and one which is economicalto produce. The adjustable jaw is secured to the handleA by means of theloop-like link C through which its shank is arranged. The link C ispivotally secured to the handle or lever yA by the pin a. The link C isalso preferably formed of boiler plate. C projects forwardly so that itsouter end overhangs the relatively stationary jaw carried by the handleor lever A.

In operation, the inner end of the lever or handle A engages the inneredge of the shank B of the movable jaw B 'The engaging portion of thehandle is preferably cam shaped.

The tendency of this, on account of the location of the bearing point ofthe link C for the shank B, is to throw the jaw B down into engagementwith the pipe or object. The forwardly projecting link C is also ofadvantage in'that it brings the bearing point for the shank B as closeas possible to its jaw, thereby lessening the liability of breaking or jbending the same under great strain.

The upper edge of the shank B is provided with forwardly rejecting teethor serrations which engage t e oppositely arranged teeth or serrationsof the bearing block D by means of which the slipping of the jaw isprevented and its adjustment accomplished.

Bearing block D is provided with a rear- Vwardly projecting finger piecebyrneans of which it may be lifted out of engagement i with the shank Bthereby permitting its adjustment. `The bearing block D is arranged overa crossieee c formed on the link C. The bearing lock is curved to passup between the cross-piece on top of the link, as

clearly appears in Fig. 1. A blade spring D is secured to the under sideof the said finger piece extension of the bearing block and is iarranged to engage the cross-piece c. The tendency of this spring is toforce the bearing block normally into engagement with the shank B.

In Fig. 1, I have illustrated my improved pipe wrench engaged upon apipe. lo disengage the pipe from the wrench, it is only necessary tomove the handle or lever A rearwardly which releases the jaws. To adjustthe jaws, it is only necessary, if it is desired to close them up, topull or push the movable jaw inwardly. If `it is desired to open thejaws, the bearing block D is lifted by pressure upon the finger piecethereof. This allows the jaw B to be moved outwardly. Upon releasing thebearing block, it is forced into engagement with the shank B by thespring D.

A pin b projects laterally at the rear end of the shank B to prevent itswithdrawal from the link. To relieve the bearing pin a of the link Cfrom excessive strain when the wrench is in operation, a stop pin c isarranged through tlie lower end of the link to engage the handle A. Tofurther relieve the strain on the pivot pin l), a curved seat or bearingis formed on the jaw A for the link C.

When the'shank B is made of a piece of boiler iron folded upon itself,as I have stated is preferred by me, it possesses sufhcient laterallspring to prevent its accidental slipping within the link when thewrench is being adjusted.

In the modified construction shown in Figs. 7 to 11 inclusive, the linkis shouldered at c at its'rear edge to form a rest for the shoulderc"formed on the bearing block D. The spring D in this construction isarranged in the linkwso that it bears upon the back of the bearingblock. In Fig. 8, the bearing block is shown thrown up to release theadjustable jaw. rIhe modified construction shown in Figs. 7 to 11inclusive, is adapted for light work, while the structure shown in Figs.1 to 6 inclusive, is especially designed for heavy work, though it isapplicable for smaller sizes of wrenches, or wrenches for light work,and the structure in Figs. 7 to 11, may also be used for heavy work,although, as I have stated, I have particularly designed the same forlight work.

With the parts arranged as I have illustrated and described, I secure awrench which is very quickly and easily adjusted to any pipe or objectwithin its scope. My improved wrench is adapted for use where it isdifficult to manipulate other wrenches on account of the confined areain which it must be used. It is quickly detached from an object, itbeing only necessary to reverse the movement of the handle to releasethe jaws.

The p arts of my improved pipe wrench are very simple and economical toproduce and the structure is very strong and durable.

IOn account of the arrangement of the handle and the link in relation tothe movable jaw and its shank, the tendency is from the irst movement togrip the jaws upon the pipe or other object and the link is so arragedthat the liability of bending or twisting the shank forwardly projectingloop-shaped link pivoted on said handle at its inner end; a movable jaw;a shank therefor having serrations or teeth on its outer edge, said jawand shank being formed of a piece of plate metal folded upon itself.arranged through said link to be engaged by the inner end of saidhandle, the engaging portion of the saidv handle with said shank beingcurved; a gripping face for said movable jaw inserted in the fold ofsaid plate; a bearing block, provided with teeth or serrationscorresponding to those of said shank and having a rearwardly projectingfinger piece arranged in the outer end of said link; a cross-bar on saidloop adapted to serve as a fulcruiii for said bearing block; and aspring carried by said bearing block, arranged to engage saidcross-piece, for the purpose specified.

2. The combination of a handle; a relatively fixed jaw on the inner endthereof; a forwardly projecting loop-shaped link pivoted on said handleat its inner end; a movable jaw; a shank therefor having serrations orteeth on its outer edge, said jaw and shank being formed of a piece ofplate metal folded upon itself, arranged through said link to be engagedby the inner end of said handle, the engaging portion of the said Ihandle with said shank being curved a gripping face for said movable jawinserted in the fold of said plate; a bearing block, provided with teethor serrations correspoiuling to those of said shank and having arearwardly projecting linger piece, arranged in the outer end of saidlink; and a spring arranged to hold said bearing block normally inengagement with said shank, for the purpose specified.

3. The combination of a handle; a relatively fixed jaw on the inner endthereof; a forwardly projecting loop-shaped link pivoted on said handleat its inner end arranged to swing forwardlyeover the said fixed jaw;provided with lteeth or serrations correa movable jaw; a shank lthereforhaving ser-` vsponding to those of said shank and having a l rearwardlyprojecting finger piece arrangedv rations or teeth' on its outer edge,said jaw andshank being formed of apiece of plate metal folded uponitself, arranged `through said link to be engaged by the inner endof`said handle, the engaging portiongf the` said handle With said shank'being curved; a gripping face for said movable jaw inserted in the foldof said plate; and abearing block provided with teeth orserrationscorresponding to those of said shank and having arearwardlyprojecting finger piece arranged in the outer end of saidlink; vfor thepurposey specified. f j

4. The combination of a handle; a `relatively fixed jaw on the inner endthereof; a forwardly projecting loop-shaped link pivoted on saidhandleat itsinnerendga mov.

able jaw; a shank therefor having ,serrations or teeth on its outeredge, saidj aw andshank being formed of a piece of plate metal foldedupon itself, arranged through said .link a gripping face for saidmovable; jaw inserted. in the fold of said plate; a bearingblock ro-`.vided with teeth or serrations correspon' ing to those of said shankand havinga lrearwardly projecting fin er iece,arranged in the outer endof saili` a cross-bar on said loop adapted to serve as a fulcrum forsaid bearing block; anda spring carried. by said bearing block, arrangedto engage said cross-piece, for the purpose specified.

5. The combination of a handle; `a relatively fixed jaw ontheinnerenduthereof; `a forwardly projecting i loop-shaped link pivoted on saidhandle at itsinner end Ya movable jaw; a shanktherefor havingserrationsor teeth on its outer edge, said jawandshank being formed of apieceof'platefmetal; folded;

upon itself, arranged through said link;`fa gripping face for saidmovable jaw inserted in the fold of said plate ,f ,a`bearinglblock,4proj vided with teeth or serrations corresponding to those of said shankand having a; rearwardly projecting finger piece arrang'edinthe outerend of said link; anda spring arranged to Yhold said bearing blocknormally .in `engageinent with said shankffor,` the purpose specified. fy n 1 i 6. The'combination' of a handle; ya relativelyiixed jaw on "theinner end thereof; a`

forwardly projecting loop-shaped `link pivoted on said'handleati-tsinner end;`a mov-V able aw; a shank therefonhavingserrations` j or teethonits outer edge, saidjaw and shank being formed of a piece of platemetal folded upon itself, arranged throughsaid link; a` gripping faceforsaid movable jaw inserted" in the foldof said plate; anda bearingblock, j

said movable jaw inserted in the fold of said plate, forthe purposespecified.

8. The combination with a handle, of a said handle-,having a curvedbearing surface on its, rear edge; la movable jaw; a shank thereforhaving a' bearing surface on its front `edge adapted to rest on saidbearing surface on, the rear edge of said handle and having serrationsor teeth vin its rear edge; a. looplike link adapted to receive saidshank arranged on said handle to embrace the same, said link beingpivoted to said handle; 'a bearing block for said shank loosely arrangedin thefouter end of said link having serrarelatively fixed jaw on theinner end thereof,

tionsorteeth on itsinner edge adapted to Ilgage said shank; and across-bar at the rearedge of said link over which saidl bearing block isloosely arranged adapted to serve as a fulcrum therefor, for the purposespecified. v

' 9.The combination with a handle, of` a relatively fixed jaw on theinner end thereof,

said handle having a'curved bearing surface Fon its rear edge; a movablejaw; a shank thereforhaving a bearing surface on its front edge adaptedto rest on said bearing surface on the rear edge of said handle andhaving serrations or teeth on its rear edge; a looplike link adapted toreceive said shank pivoted on said handle, said link being adapted tooverhang said fixed jaw; and a bearing lblock for said shank arranged inthe outer end of said'- link, said bearing block having serrations orteeth on its inner edge adapted to engage said shank for adjustablysecuring the 1 same in positionin said link, the rear pointl ofengagement of said bearing block with said shank beingin a plane infront of the plane of the pivot of ,said link, for the purposespecified. Y i

In witness whereof l have hereunto set my hand in the presence of twowitnesses.

j Y j, GEORGE C. WINSLOW. `VVitnessesz f yO'rrs A. EARL,

A. J. ALBER.

